EP0835844B1 - Verfahren zur Dosierung von wasserstoffperoxidhaltigen Lösungen - Google Patents
Verfahren zur Dosierung von wasserstoffperoxidhaltigen Lösungen Download PDFInfo
- Publication number
- EP0835844B1 EP0835844B1 EP97115069A EP97115069A EP0835844B1 EP 0835844 B1 EP0835844 B1 EP 0835844B1 EP 97115069 A EP97115069 A EP 97115069A EP 97115069 A EP97115069 A EP 97115069A EP 0835844 B1 EP0835844 B1 EP 0835844B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrode
- hydrogen peroxide
- signal
- measurement
- dosing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
- C02F1/685—Devices for dosing the additives
- C02F1/687—Devices for dosing solid compounds
Definitions
- the invention relates to a method for dosing hydrogen peroxide aqueous solutions, especially for water treatment (disinfection, Algae prevention, among others) in swimming pools, according to the preamble of the claim 1.
- an amperometric measurement as is the case with chlorine, chlorine dioxide, ozone etc. is known to be eliminated in the case of active oxygen.
- an amperometric measurement the electrical conductivity of the water, the oxygen content, the changing pH and a number of other parameters, including also detects the oxygen split off from the hydrogen peroxide, without that, however, hydrogen peroxide as a single parameter selectively to a measurement signal leads.
- No. 5,470,484 describes a method for controlling the supply of chemicals Water treatment known in which the concentration of chemicals is preferred by one consisting of a working, counter and reference electrode 3-electrode system is determined by applying an external, positive voltage between the working and counter electrodes the current flowing through the working electrode is measured and the result is obtained Signal after appropriate signal processing the chemical supply is controlled.
- This method is preferably used as reference electrodes Silver or silver chloride electrodes, as a counter electrode metal or Graphite rods and as working electrodes platinum, gold or special types of carbon used.
- the voltametric current measurement described is used, for example, to determine lead or copper in waste water streams with a comparatively low positive voltage on the working electrode of about +300 mV carried out.
- this is done using a potentiostatic measuring method the active oxygen content is recorded in proportion to the concentration as an electrical signal and then in a control system as a controlled variable for (post) dosing recycled. Only the special selection of the electrodes enables this of the 3-electrode system a reproducible measurement even with increasing Concentrations (over 30 mg / l). For the counter electrode it has turned out to be special proven unproblematic material titanium.
- the method according to the invention has proven particularly useful for measurements of aqueous solutions containing hydrogen peroxide in a concentration range between 1 and 500 ppm was found to be extremely reliable.
- the Reference signal is kept constant and the measurement signal for dosing the hydrogen peroxide-containing aqueous solution (active oxygen) continuously is compared with the reference signal. This is the electrical measurement signal to the controlled variable for replenishment.
- the method according to the invention then also becomes a defined concentration-proportional one electrical measurement signal obtained when the aqueous solution of hydrogen peroxide to improve the effect and / or accelerate the effect organic and / or inorganic biocides and / or silver and / or organic peroxides are added.
- the single figure shows the schematic structure in a block diagram representation a device for performing the dosing method according to the invention of aqueous solutions containing hydrogen peroxide.
- the device consists of a measuring and control device with a Flow armature trained measuring cell 1, which is an inlet for a sample water flow 2 and an outlet for a sample water return 3 contains.
- the measuring cell 1 has a 3-electrode system (not shown). Between a measuring electrode and a counter electrode of the electrode system becomes an electrical measurement signal and between a reference electrode and the Counter electrode generates a reference signal, both of which are connected via a line 4 a control system 5 are supplied.
- a control system 5 Measurement signal and the reference signal evaluated and to control a Dosing device 6 processed.
- This control signal is from the control system 5 fed to the metering device 6 via an electrical line 7.
- the dosing device 6 is a drive device for conveying the dosing medium, i.e. the hydrogen peroxide-containing aqueous solution, a (not shown) Synchronous geared motor arranged.
- the synchronous geared motor sucks Via a line 8 the dosing medium from a storage container 9 in the piping system of the swimming pool or the like. This is in shape a supply line 10 to the line system is shown schematically.
- the measuring electrode provided in the measuring cell 1 is a platinum electrode a negative reference voltage.
- the counter electrode is a titanium electrode.
- a stainless steel or nickel electrode can also be used.
- the reference electrode for determining the reference signal it has been found to be Electrode material silver or silver chloride has proven to be particularly advantageous.
- This combination of electrodes enables the active oxygen content to be monitored in a concentration range between 1 and 500 ppm.
- a permanent one Monitoring water quality is particularly easy when using the computer program of the control system the reference signal constantly constant is held and only the changes in the measurement signal for control the dosage of the active oxygen content can be used. Is the proportion of active oxygen in water in accordance with the setpoint, there is no dosing and the synchronous gear motor stops. Falls below the active oxygen content in the water a predetermined value, the control system switches 5 the synchronous geared motor of the dosing station 6 until the required one Dosing quantity from the dosing container 9 to the water via the feed line 10 is admitted.
- the hydrogen peroxide can aqueous solution additives in the form of organic and / or inorganic biocides, and silver and / or organic peroxides added become.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Description
Claims (3)
- Verfahren zur Dosierung von wasserstoffperoxidhaltigen wässrigen Lösungen, insbesondere zur Wasseraufbereitung in Schwimmbädern, bei dema) einer wässrigen Lösung über eine Dosiereinrichtung (6) eine wasserstoffperoxidhaltige Lösung zugeführt wird,b) mittels eines aus einer Bezugs-, Mess- und Gegenelektrode bestehenden 3-Elektroden-Systems zwischen der Mess- und der Gegenelektrode ein Messsignal sowie zwischen der Bezugs- und der Gegenelektrode ein Referenzsignal erzeugt wird, wobei als Bezugselektrode eine Silber- oder Silberchloridelektrode eingesetzt wird,c) das Mess- und das Referenzsignal zu einer Steueranlage (5) weitergeleitet wird, in der die beiden Signale aufbereitet und zu einem Steuersignal weiterverarbeitet werden, undd) das Steuersignal an die Dosiereinrichtung (6) zur Steuerung der Dosierung der wasserstoffperoxidhaltigen Lösung weitergeleitet wird,
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Messung in einem Konzentrationsbereich zwischen 1 und 500 ppm Wasserstoffperoxid durchgeführt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Referenzsignal mittels der mikroprozessorgeregelten Steueranlage (5) auf einen konstanten Wert eingestellt und kontinuierlich mit dem Messsignal für die Dosierung der wasserstoffperoxidhaltigen wässrigen Lösung verglichen wird.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29723344U DE29723344U1 (de) | 1996-10-14 | 1997-08-30 | Vorrichtung zur Dosierung von wasserstoffperoxidhaltigen wäßrigen Lösungen |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19642413 | 1996-10-14 | ||
DE19642413A DE19642413A1 (de) | 1996-10-14 | 1996-10-14 | Vorrichtung zur Dosierung von wasserstoffperoxidhaltigen wäßrigen Lösungen |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0835844A2 EP0835844A2 (de) | 1998-04-15 |
EP0835844A3 EP0835844A3 (de) | 1998-12-02 |
EP0835844B1 true EP0835844B1 (de) | 2002-06-12 |
Family
ID=7808751
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97115069A Expired - Lifetime EP0835844B1 (de) | 1996-10-14 | 1997-08-30 | Verfahren zur Dosierung von wasserstoffperoxidhaltigen Lösungen |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0835844B1 (de) |
AT (1) | ATE219033T1 (de) |
DE (2) | DE19642413A1 (de) |
ES (1) | ES2178732T3 (de) |
PT (1) | PT835844E (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29715378U1 (de) | 1997-08-27 | 1998-02-12 | Dinotec GmbH, 63477 Maintal | Meß-, Regel- und Dosierstation |
DE19953218C2 (de) * | 1999-11-05 | 2001-08-30 | Juchheim Gmbh & Co M K | Indikatorelektrode mit einer sensitiven Oberfläche und Verwendung hierfür |
DE10212570B4 (de) * | 2002-03-12 | 2004-02-19 | Bst Bio Sensor Technologie Gmbh | Amperometrischer Dickschicht-Biosensor zur Bestimmung der Wasserstoffperoxid-Konzentration in einer Lösung und Verfahren zur Herstellung des Sensors |
US10228359B2 (en) | 2017-03-16 | 2019-03-12 | Gecko Alliance Group Inc. | Method, device and apparatus for monitoring halogen levels in a body of water |
RU2699372C1 (ru) * | 2019-05-22 | 2019-09-05 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Орловский государственный аграрный университет имени Н.В. Парахина" | Средство для дезинфекции воздушной среды закрытых помещений |
CN113155762B (zh) * | 2021-04-14 | 2022-11-25 | 贵阳海关综合技术中心(贵州国际旅行卫生保健中心、贵阳海关口岸门诊部) | 一种基于V6O13纳米带催化活性的Cd(II)和Pb(II)检测方法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3815620A (en) * | 1970-06-30 | 1974-06-11 | Volkswagenwerk Ag | Measuring and/or control device for the setting of the constituents of a chemical solution especially of a galvanic bath |
US3902970A (en) * | 1973-07-30 | 1975-09-02 | Leeds & Northrup Co | Flow-through amperometric measuring system and method |
DE3125452C2 (de) * | 1981-06-29 | 1985-09-12 | Degussa Ag, 6000 Frankfurt | Verfahren zum Entgiften und zum Absenken des CSB und des BSB in kontinuierlichen Abwasserströmen mit wechselnden Gehalten verschiedener oxidierbarer Inhaltsstoffe mit Wasserstoffperoxid |
DE4223228C2 (de) * | 1992-07-15 | 1995-01-19 | Prominent Dosiertechnik Gmbh | Verfahren zur Bestimmung von Persäuren |
US5364510A (en) * | 1993-02-12 | 1994-11-15 | Sematech, Inc. | Scheme for bath chemistry measurement and control for improved semiconductor wet processing |
US5470484A (en) * | 1994-01-13 | 1995-11-28 | Buckman Laboratories International, Inc. | Method and apparatus for controlling the feed of water treatment chemicals using a voltammetric sensor |
-
1996
- 1996-10-14 DE DE19642413A patent/DE19642413A1/de not_active Withdrawn
-
1997
- 1997-08-30 ES ES97115069T patent/ES2178732T3/es not_active Expired - Lifetime
- 1997-08-30 EP EP97115069A patent/EP0835844B1/de not_active Expired - Lifetime
- 1997-08-30 PT PT97115069T patent/PT835844E/pt unknown
- 1997-08-30 DE DE59707482T patent/DE59707482D1/de not_active Expired - Lifetime
- 1997-08-30 AT AT97115069T patent/ATE219033T1/de active
Also Published As
Publication number | Publication date |
---|---|
DE59707482D1 (de) | 2002-07-18 |
PT835844E (pt) | 2002-11-29 |
DE19642413A1 (de) | 1998-04-16 |
EP0835844A2 (de) | 1998-04-15 |
ATE219033T1 (de) | 2002-06-15 |
EP0835844A3 (de) | 1998-12-02 |
ES2178732T3 (es) | 2003-01-01 |
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